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- W2891785139 abstract "Abstract We report on generation and observation of photoacoustic pulses in bismuth thin films using femtosecond reflectivity spectroscopy. Upon photoexcitation of bismuth thin films with a femtosecond laser pulse, hot carriers are created in the optical penetration depth and diffuse into the interior. They scatter off the interface effectively and raise the lattice temperature generating a picosecond acoustic phonon pulse which propagates towards the free surface and modulates the reflectivity. By monitoring the reflectivity change at the surface in real time, we investigate photoacoustic responses as a function of excitation fluence and film thickness." @default.
- W2891785139 created "2018-09-27" @default.
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- W2891785139 date "2018-11-01" @default.
- W2891785139 modified "2023-10-12" @default.
- W2891785139 title "Femtosecond reflectivity study of photoacoustic responses in bismuth thin films" @default.
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- W2891785139 doi "https://doi.org/10.1016/j.tsf.2018.09.037" @default.
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